Numbers k, excluding primes and squares of primes, such that gcd(k, numerator of H(k-1)) > 1, where the harmonic number H(j) = Sum_{i=1..j} 1/i.
A228810
Numbers k, excluding primes and squares of primes, such that gcd(k, numerator of H(k-1)) > 1, where the harmonic number H(j) = Sum_{i=1..j} 1/i.
Terms
- a(0) =88a(1) =1290a(2) =9339a(3) =102619a(4) =102729a(5) =116424a(6) =116512a(7) =343594a(8) =372889a(9) =904428a(10) =1129909a(11) =1129942a(12) =1130019a(13) =1280554a(14) =1280664a(15) =2351307a(16) =12723966a(17) =12728166a(18) =12809227a(19) =12818637a(20) =12869013
External references
- oeis: A228810